(Image Monstrum XXL kit I use by Sparrows).
So I am back to lockpicking again (KEEP IT LEGAL!). It is a fun hobby and great for older fingers to stay nimble! If you like puzzles then this is exactly that. And its cheap too as no doubt you have locks on your home or padlocks lying around. Even if you dont you can pick them up from friends or from locksmiths without keys for next to nothing. Nerds and security analysts tend to also be interested in this field as it involves using tools as stealthily as possible to access secure systems (your door or a server firewall).